BROOKLYN

*** Police are searching for an elderly Alzheimer’s woman who disappeared three days ago.

The missing woman Esther Henry (above), is the mother of Val Henry, who serves as the chief of staff for Rep. Edolphus Towns.

The missing woman was last seen at 3:35 p.m. Thursday on the corner of Linden Boulevard and East 46th Street, in East Flatbush, police said.

Ruth Morrison, spokeswoman for Towns, told The Post that Ms. Henry had attended the Park Slope Geriatric Center, as she normally does during the week, and was being driven home by a new driver employed by the center.

Rather than dropping her off at Ms. Henry’s daughter’s home nearby, he mistakenly left her at an intersection and she hasn’t been seen since, said Morrison, who asked for the public’s assistance in locating the woman.

“Fortunately, the weather has been cooperative, but we have a woman with Alzheimer’s and don’t know what harm could come to her,” she said.

Ms. Henry was described as 5-foot-3, 160 pounds, with black hair and brown eyes. She wears glasses and was last wearing a light-green jacket, red turtleneck and black-and-white checkered pants.

QUEENS

*** An off-duty city Sanitation worker was arrested for driving under the influence after he was seen driving recklessly before getting into a fender-bender in Oakland Gardens, police said yesterday.

Luis Dacasta, 30, was driving east on the Long Island Expressway at 9:30 p.m. Friday when cops responded to a report of a reckless driver.

They spotted Dacasta’s green 1994 Mazda, which had collided into a 2002 black Mercedes-Benz just off exit 29, at the intersection of Springfield Boulevard and the Horace Harding Expressway.

Dacasta was not injured, nor were the 36-year-old woman driving the Mercedes and the 48-year-old man she had been driving.

He was charged with driving under the influence of drugs after cops found unspecified pills on him.

STATEN ISLAND

*** A high-school student was arrested after he was found carrying a knife inside the St. George school he attends, police sources said yesterday.

Luis Sierra, 17, of Layton Avenue, a student at Curtis HS, was arrested at 10 a.m. Friday after a dean at the Hamilton Avenue school told cops that Sierra had a 3-inch jagged-edged knife.

Sierra was charged with criminal possession of a weapon.

*** A man who vandalized a Staten Island train has been arrested for criminal mischief, police said yesterday.

Giorgio Conte, 35, allegedly broke a window on a Staten Island Rapid Transit train just before 4 p.m., sources said.

*** Cops were looking for a thief who broke into an Eltingville church and swiped $20 from poor boxes there.

About 8:40 p.m. Friday, it was discovered that someone had gained access to five poor boxes in Our Lady Star of the Sea Roman Catholic Church, on Amboy Road, sources said.

THE BRONX

*** A teen is facing criminal charges for firing a gun inside a University Heights apartment, hitting a girl in an adjacent apartment, police sources said yesterday.

Demetria Walters, 15, was hit about 8:45 a.m. Thursday when a bullet ripped through the wall of her Creston Avenue apartment, hitting a wall unit and a pillowcase before striking her in the left hip.

She waited until 5 a.m. Friday to go to St. Barnabas Hospital, where she was treated and released.

Detectives later arrested David Rush, 16, who was wanted on an upstate Family Court warrant, sources said.

The gun was not recovered. Charges against Rush were pending.